#284BD7
Approximate name: Royal Blue
Technical formats
Color-space values for scientific work and cross-device comparison.
Practical formats
Ready to paste into CSS, Tailwind, iOS, Android, Flutter, and more.
Color analysis
Objective metrics: luminance, hue, saturation, temperature, and contrast.
Nearest name
RoyalBlue
Relative luminance
0.104
Hue H
228°
Saturation S
69%
Lightness L
50%
Value V
84%
Temperature
Cool
Brightness
Dark
Chroma
Vivid
Hue family
Blue
Contrast on white: 6.82:1 (AA body Pass / AAA Fail)
Contrast on black: 3.08:1 (AA body Fail / AAA Fail)
Open full contrast tool →Color blindness simulator
Approximate appearance under common color-vision deficiencies (matrix simulation).
Normal vision
#284bd7
Protanopia
#3737b5
Deuteranopia
#3533ad
Tritanopia
#2a9a95
Achromatopsia
#505050
Creative pairings
Hue-wheel harmonies and 10% shade/tint steps — not AI-generated copy.